General Mathematics Puzzles-2: Fun for allAbout a fortnight ago, I posted a mathematics puzzle-1 and seeing the good response to that I am now posting the second one.
In mathematics, if there are two unknowns then we require two number of equations to solve it to find the value of these two unknowns. The normal way as how it is done is that first we make these two equations and then solve them using basic algebra.
My friend told me that he would solve a single equation containing two unknowns and gave me one interesting example.
He asked me to think about the children in a family and multiply the number of boys by 2 and add 5 to it. Then he asked me to multiply the result by 5 and then add number of girls to it and then tell the result to him. I calculated and told him that I got 58. He immediately replied that there are 3 boys and 3 girls in the family.
Can you find out how he did it?